What is CVE-2025-12657?

CVE-2025-12657 is a medium-severity vulnerability in MongoDB, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.0/10. Published 2025-11-03.

How severe is CVE-2025-12657?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Vulnerability in MongoDB

CVE-2025-12657

The KMIP response parser built into mongo binaries is overly tolerant of certain malformed packets, and may parse them into invalid objects. Later reads of this object can result in read access violations.

EPSS: 0.004 (28.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H.

Affected products

Mongodb
Mongodb Inc. Server — versions 6.0, 8.0

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

cna@mongodb.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-12657?: CVE-2025-12657 is a medium-severity vulnerability in MongoDB, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.0/10. Published 2025-11-03.
How severe is CVE-2025-12657?: Medium severity. CVSS v3 base score is 5.0 out of 10.